I've one of the 'antique' 10" unlabeled cast irons pans and it performs right along with Griswalds and Wagners in the kitchen collection.
That must be what I have. My mother gave me my grandmother's old cast iron skillet a couple of years ago, and I posted here to see if anyone could identify the maker. It only has a number 8 on the bottom, and nothing else. Works great, though, once I learned how to season it. My mom tells me it was already old back in the 1930s, so no telling when it was made.
